Mary Lou McNabb, Robert McNabb and Ann Swanson check out the Galaxy of Lights.

It's all at the Huntsville Botanical Garden's Galaxy of Lights, which opens to the public on Friday with walking tours from 5 to 7:30 p.m. The walk-through nights continue on Saturday and Sunday from 5 to 7:30 p.m. Admission is adults $6, children $3.